Today I hate when I tell someone that I'm training for a 24-hour race, and they say, "Oh... so... is that... is it to raise money for charity?" No, I explain patiently, it's an athletic competition, not the Avon Walk. (Not that there's anything wrong with the Avon Walk. But what I'm doing is quite different.)
Now, as it happens, my world record attempt probably will raise money for charity, just like most races. The Boston Marathon, for example, raises money for several charities, including Habitat for Humanity and the National Multiple Sclerosis Society. But if I said I was training for the Boston Marathon, nobody would ask if I was doing it as a fundraiser, would they?